Abstract:
A bridge rectifier circuit including a first and second pair of bipolar transistors, wherein the bipolar transistors of each pair have conductivity types that are opposite from one another; first and second input terminals coupled to each of the bipolar transistors; and first and second output terminals coupled to each of the bipolar transistors. Furthermore, each of the bipolar transistors is configured to operate in reverse-active mode.
Abstract:
The present invention relates to liquid radiation-curing compositions having flexible and elastic material properties in the cured state, consisting of the following components: a) from 5.0 to 99.0% by weight of a di- or polyfunctional polyether (meth)-acrylate compound having a molecular weight of more than 1000 g/mol; b) from 1.00 to 90.0% by weight of a mono-, di- or polyfunctional radiation-curing (meth)acrylate compound having a molecular weight of less than 1000 g/mol as a reactive component or reactive thinner or cross-linking agent for the formation of polymer networks; c) from 0.05 to 10.0% by weight of a free-radical forming photoinitiator; d) from 0.001 to 5.0% by weight of further components; with the proviso that the sum of components a) to d) amounts to 100% by weight. Further, the present invention relates to products obtainable from the compositions according to the invention, and processes for the preparation, treatment and use of three-dimensional shaped objects made from the compositions according to the invention.
Abstract:
A panoramic camera for producing pictures with randomly large image or viewing angles which may exceed 360.degree. and in which at the moment of exposure the objective or film is stationary. There is provided a camera housing containing the objective and rotatable relative to a support or holder. There is further provided a film container and a film guide having a cylindrical guide portion, the radius of curvature of which is equal to the focal length of the objective. According to the invention the camera housing besides containing the objective also includes the film container, the film guide also including a ring in the housing opposite from the support which is freely rotatable or stationary respective to the housing. The support is cylindrical and a cylindrical circumferential surface is provided at the edge of cylindrical support. The film is fixedly held with its one edge at the cylindrical circumferential surface and with its other edge is held under contact at a second cylindrical circumferential surface formed on the ring.
Abstract:
Disclosed is a piezo bending transducer drop-on-demand print head and a method of actuating it. Each of the piezo bending transducers of a piezo bending transducer drop-on-demand print head is subjected to a sequence, corresponding to the desired print image, of triggering pulses each effecting a drop discharge movement and, assigned to each triggering pulse, each piezo bending transducer neighboring the piezo bending transducer triggered by the triggering pulse is subjected to a compensating pulse deflecting it. The piezo bending transducer drop-on-demand print head has a nozzle plate with nozzles arranged in series. Respectively assigned to each nozzle is a piezo bending transducer which can be subjected to a triggering pulse accompanied by a drop being discharged from the respective nozzle. There is a control device by which each of the piezo bending transducers can be subjected to triggering pulses and compensating pulses in accordance with the method of the invention.
Abstract:
By means of two cylinders each composed of two interconnected discs, and which cylinders are rotatable in synchronism about a common axis and respectively transport along portions of their circumference an image carrier and a copy carrier, such carriers are continuously forwardly moved at identical angular velocities. A light source projects the negative located at the image carrier through an objective arranged at the common axis upon the copy carrier. The magnification and ratio reduction ratio is proportional to the ratio of the diameters of both cylinders. The light beam which passes through a slotted diaphragm projects continuously and in a strip-shaped configuration the negative from the image carrier to the copy carrier with constant opposite sense movement of such image and copy carriers.